linux-kernel - Re: [PATCH v4 1/2] serial: rewrite pxa2xx-uart to use 8250

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Date:	Sat, 19 Dec 2015 14:26:28 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	linux-kernel@...r.kernel.org, Kevin Hilman <khilman@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
	linux-serial@...r.kernel.org (open list:SERIAL DRIVERS)
Subject: Re: [PATCH v4 1/2] serial: rewrite pxa2xx-uart to use 8250_core

Robert Jarzmik <robert.jarzmik@...e.fr> writes:

> Sergei Ianovich <ynvich@...il.com> writes:
>
>> pxa2xx-uart was a separate uart platform driver. It was declaring
>> the same device names and numbers as 8250 driver. As a result,
>> it was impossible to use 8250 driver on PXA SoCs.
>>
>> Upon closer examination pxa2xx-uart turned out to be a clone of
>> 8250_core driver.
>>
>> Workaround for Erratum #19 according to Marvel(R) PXA270M Processor
>> Specification Update (April 19, 2010) is dropped. 8250_core reads
>> from FIFO immediately after checking DR bit in LSR.
>>
>> Signed-off-by: Sergei Ianovich <ynvich@...il.com>
>> Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
>> Reviewed-by: James Cameron <quozl@...top.org>
>> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Tested-by: Robert Jarzmik <robert.jarzmik@...e.fr>

Shrunk the list, the following is rather mach-pxa specific.

Actually there is a small glitch ...
Have a look at arch/arm/mach-pxa/viper.c, line 490:
	#ifndef CONFIG_SERIAL_PXA
	...

But that can be handled in an subsequent patch to keep your acks and reviews.

Cheers.

-- 
Robert
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